In The Simpsons long, storied, but mostly long history, only two episodes (of the 513 and counting) have been written by “outside help”: season 17’s “Homer Simpson, This Is Your Wife” by Ricky Gervais and season 21’s “Homer the Whopper” from Evan Goldberg and Seth Rogen, who got his big break on Freaks and Geeks, which is a convenient segue for this block quote about the creator of that show, Judd Apatow.

Sitting down with Conan O’Brien recently on the talk show host’s new, much more sober web chat series “Serious Jibber-Jabber,” Apatow reveals that his script for The Simpsons is going into production for an episode next year. So what is it all about? Here’s what Apatow said about it during a Q&A following a screening of This Is 40 at Film Independent earlier this month:

The first thing I ever wrote was a spec episode of The Simpsons. After only five Simpsons episodes aired, I sat down and tried to write one when I was in my early twenties. And what it was about was they went to see a hypnotism show and at the hypnotism show, they made Homer think he was the same age at Bart. And then the hypnotist had a heart attack. So now Homer and Bart became best friends and they spent the rest of the show running away because Homer didn’t want responsibility and didn’t want to be brought back to his real age. So I basically copied that for every movie I’ve made since. (Via)

If recent history is any indication, Julia Kavner, the voice of Marge, will be replaced by Leslie Mann, as will Nancy Cartwright (Bart) and Yeardley Smith (Lisa) with Precocious Apatow Kid #1 and Precocious Apatow Kid #2, and the episode will be good, but at least 45 minutes too long. There will also be at least one Wilco song.

And what it was about was they went to see a hypnotism show and at the hypnotism show, they made Homer think he was the same age at Bart. And then the hypnotist had a heart attack.[…] So I basically copied that for every movie I’ve made since.”

Simpsons did it! (at least the hypnotist affecting Homer part). This episode wouldn’t really be all that different from a normal episode. Back when the show was 5 episodes in, Homer was still relatively responsible and fairly stern. Over the years he’s become a big child